An Agricultural Company Wanted to Know If a New Insecticide

An agricultural company wanted to know if a new insecticide would increase corn yields. Eight test plots showed an average increase of 3.125 bushels per acre.The standard deviation
Of the increases was 2.911 bushels per acre.Determine a 90% confidence interval for the
Mean increase in yield.

A) (2.435, 3.815)
B) (1.175, 5.075)
C) (2.435, 5.075)
D) (1.175, 3.815)
E) (-5.075, -3.815)